Canon 577 G - Manual (Page 10)

(4) Sensor Unit G20 to Camera
and Flash
Rather than having a built-in sensor,
the 577G has a separate one which
slips
into the camera’s accessory
shoe. It is very finely attuned to the
particular Speedlite 577G with which
it comes so that it can give the best
results possible.
1. Loosen the sensor's lock nut and
slide it into the camera’s acces­
sory shoe so that its eye is facing
forward. If the accessory shoe is
a hot shoe, be careful to push the
sensor all the way in so that pro­
per electrical connection will be
made. Then tighten the lock nut.
2. To connect the sensor with the
577G, align the index on the plug
at the end of its cord with the
index on the 577G’s sensor socket
and push the plug in all the way.
♦ If the camera does not have a hot
shoe, Synchro-Cord A, an op­
tional accessory, must also be
attached. See p. 31.
• A flash coupler must be used to
attach the sensor to the Canon
F-1. Three are available as op­
tional accessories. Flash Coupler
F is especially for this combina­
tion. Flash Coupler D or L may
also be used.
• Since the 577G and the sensor
provided with it are so carefully
matched
to each other, they
should be considered a set. Do
not use the 577G with a different
sensor unit G20.